Designed to facilitate the installation, service, and maintenance of analog telephone lines, this telephone butt set has all the essential functions for testing telephone lines such as detecting dial tone, making and receiving calls, and tone and pulse modes. This telephone test set also features the following:

Dial, ring, talk, mute, or redial using this telephone line tester
Sends signals via dial tone (DTMF) or dial pulse
Angled Bed-of-Nails (ABN) Clips clamp connections securely
Includes telephone line tester, RJ11 test cord, and an extra fuse
Waterproof housing protects the unit from inclimate weather
RJ11 switchbox can test telephone lines directly by plugging them in
Battery free! No need for batteries as the unit operates using the ABN hook up or is powered by the telephone line